Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . FIG. 40. the dome, as large and small domes are used indiscriminately,and frequently the same size dome is placed upon several dif-ferent sized boilers. NEUTRAL SHEET UNDER DOME. The neutral sheet under the dome derives its name fromthe fact that it is subjected to pressure from both are several methods of providing for the passage ofsteam through the neutral sheet into the dome. Some punchout a hole in the center on
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . FIG. 40. the dome, as large and small domes are used indiscriminately,and frequently the same size dome is placed upon several dif-ferent sized boilers. NEUTRAL SHEET UNDER DOME. The neutral sheet under the dome derives its name fromthe fact that it is subjected to pressure from both are several methods of providing for the passage ofsteam through the neutral sheet into the dome. Some punchout a hole in the center one and a half times the diameter ofthe steam outlet, while others perforate the neutral sheet with a great number of small holes. The latter method is used inorder not to weaken the sheet to such an extent as when alarge hole is punched. Some claim that placing a dome on aboiler brings an unequal strain upon the shell sheets, due tothe fact that the pressure on the dome is borne by the shell. FIG. 39. sheet where the dome is attached. Authorities differ on thispoint however. The use of a liner inside underneath thedome is advocated for strength to cover any weakness that
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
